/*
 * The contents of this web application are subject to the Mozilla Public License Version 
 * 1.1 (the "License"); you may not use this web application except in compliance with 
 * the License. You may obtain a copy of the License at http://www.mozilla.org/MPL/.
 * 
 * Software distributed under the License is distributed on an "AS IS" basis, 
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License 
 * for the specific language governing rights and limitations under the License.
 * 
 * The Original Code is owned by and the Initial Developer of the Original Code is 
 * Composite A/S (Danish business reg.no. 21744409). All Rights Reserved
 * 
 * Section 11 of the License is EXPRESSLY amended to include a provision stating 
 * that any dispute, including but not limited to disputes related to the enforcement 
 * of the License, to which Composite A/S as owner of the Original Code, as Initial 
 * Developer or in any other role, becomes a part to shall be governed by Danish law 
 * and be initiated before the Copenhagen City Court ("K�benhavns Byret")            
 */

using System;
using System.Linq;
using Composite.Core.Routing;
using Composite.Data;

namespace Composite.News
{
    class NewsDataUrlMapper : IDataUrlMapper
    {
        public PageUrlData GetPageUrlData(IDataReference dataReference)
        {
            if (dataReference.ReferencedType != typeof(NewsItem))
            {
                return null;
            }

            var data = dataReference.Data;

            var newsItem = data as NewsItem;
            if (newsItem == null) return null;

            var page = PageManager.GetPageById(newsItem.PageId);
            if (page == null) return null;

            var newsPathInfo = NewsFacade.GetPathInfo(newsItem.TitleUrl, newsItem.Date);

            return new PageUrlData(page) { PathInfo = newsPathInfo };
        }

        public IDataReference GetData(PageUrlData pageUrlData)
        {
            string pathInfo = pageUrlData.PathInfo;
            if (pathInfo == null)
            {
                return null;
            }

            string[] pathInfoParts = pathInfo.Split(new[] { '/' }, StringSplitOptions.RemoveEmptyEntries);
            if (pathInfoParts.Length != 4) return null;

            if (string.IsNullOrEmpty(pathInfo)) return null;

            int year, month, day;

            if (int.TryParse(pathInfoParts[0], out year) 
                && int.TryParse(pathInfoParts[1], out month) 
                && int.TryParse(pathInfoParts[2], out day)
                && DateTimeUtils.IsValidDate(year, month, day))
            {
                Guid pageId = pageUrlData.PageId;
                string titleUrl = pathInfoParts[3];
                var date = new DateTime(year, month, day);

                var data = DataFacade.GetData<NewsItem>()
                    .FirstOrDefault(n => n.PageId == pageId && n.Date.Date == date && n.TitleUrl == titleUrl);

                return data != null ? data.ToDataReference() : null;
            }

            return null;
        }
    }
}
